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Asare N, Duale N, Slagsvold HH, Lindeman B, Olsen AK, Gromadzka-Ostrowska J, Meczynska-Wielgosz S, Kruszewski M, Brunborg G, Instanes C. Genotoxicity and gene expression modulation of silver and titanium dioxide nanoparticles in mice. Nanotoxicology 2015; 10:312-21. [PMID: 26923343 DOI: 10.3109/17435390.2015.1071443] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Recently, we showed that silver nanoparticles (AgNPs) caused apoptosis, necrosis and DNA strand breaks in different cell models in vitro. These findings warranted analyses of their relevance in vivo. We investigated the genotoxic potential and gene expression profiles of silver particles of nano- (Ag20, 20 nm) and submicron- (Ag200, 200 nm) size and titanium dioxide nanoparticles (TiO2-NPs, 21 nm) in selected tissues from exposed male mice including the gonades. A single dose of 5 mg/kg bw nanoparticles was administered intravenously to male mice derived from C57BL6 (WT) and 8-oxoguanine DNA glycosylase knock-out (Ogg1(-/-) KO). Testis, lung and liver were harvested one and seven days post-exposure and analyzed for DNA strand breaks and oxidized purines employing the Comet assay with Formamidopyrimidine DNA glycosylase (Fpg) treatment, and sperm DNA fragmentation by the sperm chromatin structure assay (SCSA). Based on an initial screening of a panel of 21 genes, seven genes were selected and their expression levels were analyzed in all lung and testis tissues sampled from all animals (n = 6 mice/treatment group) using qPCR. AgNPs, in particular Ag200, caused significantly increased levels of DNA strand breaks and alkali labile sites in lung, seven days post-exposure. Fpg-sensitive lesions were significantly induced in both testis and lung. The transcript level of some key genes; Atm, Rad51, Sod1, Fos and Mmp3, were significantly induced compared to controls, particularly in lung samples from Ag200-exposed KO mice. We conclude that the Ag200 causes genotoxicity and distinct gene expression patterns in selected DNA damage response and repair related genes.
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Affiliation(s)
- Nana Asare
- a Department of Chemicals and Radiation, Division of Environmental Medicine , Norwegian Institute of Public Health , Oslo , Norway
| | - Nur Duale
- a Department of Chemicals and Radiation, Division of Environmental Medicine , Norwegian Institute of Public Health , Oslo , Norway
| | - Hege H Slagsvold
- a Department of Chemicals and Radiation, Division of Environmental Medicine , Norwegian Institute of Public Health , Oslo , Norway .,b Norwegian Directorate for Civil Protection , Tønsberg , Norway
| | - Birgitte Lindeman
- a Department of Chemicals and Radiation, Division of Environmental Medicine , Norwegian Institute of Public Health , Oslo , Norway
| | - Ann Karin Olsen
- a Department of Chemicals and Radiation, Division of Environmental Medicine , Norwegian Institute of Public Health , Oslo , Norway
| | | | - Sylwia Meczynska-Wielgosz
- d Institute of Nuclear Chemistry and Technology, Center for Radiobiology and Biological Dosimetry , Warsaw , Poland
| | - Marcin Kruszewski
- e Department of Molecular Biology and Translational Research , Institute of Rural Health , Lublin , Poland , and.,f Faculty of Medicine , University of Information Technology and Management in Rzeszów , Rzeszów , Poland
| | - Gunnar Brunborg
- a Department of Chemicals and Radiation, Division of Environmental Medicine , Norwegian Institute of Public Health , Oslo , Norway
| | - Christine Instanes
- a Department of Chemicals and Radiation, Division of Environmental Medicine , Norwegian Institute of Public Health , Oslo , Norway
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Hertel-Aas T, Oughton DH, Jaworska A, Brunborg G. Induction and repair of DNA strand breaks and oxidised bases in somatic and spermatogenic cells from the earthworm Eisenia fetida after exposure to ionising radiation. Mutagenesis 2011; 26:783-93. [DOI: 10.1093/mutage/ger048] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
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